IBM Tivoli Access Manager for e-business: WebSEAL Administration ...

Compression
policy
in
POPs
You
can
specify
a
compression
policy
of
do
not
compress
in
a
protected
object
policy
(POP).
You
can
attach
the
POP
to
an
object,
and
WebSEAL
disables
compression
of
that
object.
To
specify
this
policy,
add
the
following
attribute
to
the
POP:
document-compression
=
no
A
POP
without
this
attribute
set,
or
with
this
attribute
set
to
any
value
other
than
no,
allows
documents
to
be
compressed.
For
example,
to
disable
compression
for
the
junction
/appOne:
pdadmin>
pop
create
appOnePop
pdadmin>
pop
modify
appOnePop
set
attribute
document-compression
no
pdadmin>
pop
attach
/WebSEAL/host/appOne
appOnePop
To
allow
compression
for
a
subdirectory
beneath
/appOne
with
an
overriding
POP,
attach
a
different
POP
that
does
not
have
the
document-compression
attribute.
For
example:
pdadmin>
pop
create
dataPop
pdadmin>
pop
attach
/WebSEAL/host/appOne/data
dataPop
This
method
of
applying
compression
policy
can
be
used
with
URLs.
For
example,
to
disable
compression
based
on
wild
card
patterns
applied
to
URLs,
you
can
use
dynurl.
To
disable
compression
for
all
requests
to
a
junction
that
have
a
particular
argument
in
the
query
string,
you
can
create
a
dynurl.conf
file
with
entries
like
the
following:
/disableCompression
/appOne/*\?want-response=text/xml
You
can
then
attach
a
pop
to
/WebSEAL/host/disableCompression
with
the
document-compression
attribute
set
to
no.
Data
compression
limitation
v
The
transfer
of
compressed
data
between
WebSEAL
and
backend
servers
is
not
supported.
WebSEAL
performs
filtering
on
URLs
for
various
purposes.
WebSEAL
does
not
perform
filtering
on
compressed
data.
Data
compression
configuration
To
specify
data
compression
policy
for
communication
between
WebSEAL
and
client
browsers,
complete
the
following
steps:
1.
In
the
WebSEAL
configuration
file,
specify
each
MIME-type
for
which
a
data
compression
policy
applies.
Assign
a
value
that
enforces
the
policy.
[compress-mime-types]
mime_type
=
minimum_doc_size
Note
that
the
default
setting
leaves
all
data
uncompressed:
[compress-mime-types]
*/*
=
-1
For
more
information
on
creating
entries
in
this
stanza,
see
“Compression
based
on
MIME-type”
on
page
80.
2.
In
the
WebSEAL
configuration
file,
specify
each
type
of
user
agent
(browser)
for
which
a
data
compression
policy
applies.
Enable
data
compression
by
assigning
the
value
yes.
Disable
data
compression
by
assigning
the
value
no.
82
IBM
Tivoli
Access
Manager
for
e-business:
WebSEAL
Administration
Guide